So she has no bangs which draws the idea of the lace front, not exactly sure how it would then look in the back however, perhaps I'd have to buy additional wefts to sew into the back? Also the volume of the ponytail after the clip like hair-tye brings into question how well the ponytail clip would work, as I've never used one before I'm not quite sure how it... attaches.

Personally, I wouldn't mess around with wefting a lace fronts. Her tiara/headpiece covers her hairline, so if I were you, I would just buy a Jasmine, add the bangs to the ponytail, and call it a day. It'd be a lot easier and a safer bet than trying to weft in a ponytail when you've never done it before.

I agree. And you can still add a ponytail clip overtop or extra wefts to get it thicker if you need really big volume. But ardas fiber can also fluff up well with back combing if you know how to do that